THORLABS MTD415T, Техническое описание

Страница: 9 / 30

© 2016 Thorlabs GmbH
4 Functional Block Diagram
9 MTD415T Data Sheet Rev. 1.0
4 Functional Block Diagram
Functional Block Diagram MTD415T
Principle of Operation
In general, a temperature controller (within the blue frame) is a closed loop system. A
temperature sensor measures the temperature of the controlled object (e.g., a laser diode).
This
actual temperature signal is amplified and compared with the temperature set value .
The differential signal out of the comparator controls then the current of the thermoelectric
cooler in order to maintain the temperature of the object constant. Ideally, the temperature
settling is carried out in the shortest times, with minimum settling error and without temperature
overshoots.
A thermoelectric coolers is a Peltier element that produces a temperature gradient depending
on the current direction trough the TEC. For this reason, the TEC current must be bidirectional.
In order to adapt the control loop to different thermal loads, and to optimize the temperature
controller's response characteristics, a PID amplifier is used. Closer information please see in
the PID Tutorial (
page )
20